Leaflet with google maps

by Alexandru Pufan

HTML

<script src="https://maps.google.com/maps/api/js?sensor=false&amp;dummy=.js"></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.css">
<script src="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.js"></script>
<script src="https://rawgithub.com/shramov/leaflet-plugins/master/layer/tile/Google.js"></script>
<body>
<div id="map" style="width: 600px; height: 400px"></div>
</body>

CSS

/* required styles */

.leaflet-map-pane,
.leaflet-tile,
.leaflet-marker-icon,
.leaflet-marker-shadow,
.leaflet-tile-pane,
.leaflet-tile-container,
.leaflet-overlay-pane,
.leaflet-shadow-pane,
.leaflet-marker-pane,
.leaflet-popup-pane,
.leaflet-overlay-pane svg,
.leaflet-zoom-box,
.leaflet-image-layer,
.leaflet-layer {
	position: absolute;
	left: 0;
	top: 0;
	}
.leaflet-container {
	overflow: hidden;
	-ms-touch-action: none;
	}
.leaflet-tile,
.leaflet-marker-icon,
.leaflet-marker-shadow {
	-webkit-user-select: none;
	   -moz-user-select: none;
	        user-select: none;
	-webkit-user-drag: none;
	}
.leaflet-marker-icon,
.leaflet-marker-shadow {
	display: block;
	}
/* map is broken in FF if you have max-width: 100% on tiles */
.leaflet-container img {
	max-width: none !important;
	}
/* stupid Android 2 doesn't understand "max-width: none" properly */
.leaflet-container img.leaflet-image-layer {
	max-width: 15000px !important;
	}
.leaflet-tile {
	filter: inherit;
	visibility: hidden;
	}
.leaflet-tile-loaded {
	visibility: inherit;
	}
.leaflet-zoom-box {
	width: 0;
	height: 0;
	}
/* workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=888319 */
.leaflet-overlay-pane svg {
	-moz-user-select: none;
	}

.leaflet-tile-pane    { z-index: 2; }
.leaflet-objects-pane { z-index: 3; }
.leaflet-overlay-pane { z-index: 4; }
.leaflet-shadow-pane  { z-index: 5; }
.leaflet-marker-pane  { z-index: 6; }
.leaflet-popup-pane   { z-index: 7; }

.leaflet-vml-shape {
	width: 1px;
	height: 1px;
	}
.lvml {
	behavior: url(#default#VML);
	display: inline-block;
	position: absolute;
	}


/* control positioning */

.leaflet-control {
	position: relative;
	z-index: 7;
	pointer-events: auto;
	}
.leaflet-top,
.leaflet-bottom {
	position: absolute;
	z-index: 1000;
	pointer-events: none;
	}
.leaflet-top {
	top: 0;
	}
.leaflet-right {
	right: 0;
	}
.leaflet-bottom {
	bottom: 0;
	}
.leaflet-left {
	left: 0;
	}
.leaflet-control {
	float: left;
	clear: both;
	}
.leaflet-right .leaflet-control...

JavaScript

var cities = new L.LayerGroup();

L.marker([39.61, -105.02]).bindPopup('This is Littleton, CO.').addTo(cities),
L.marker([39.74, -104.99]).bindPopup('This is Denver, CO.').addTo(cities),
L.marker([39.73, -104.8]).bindPopup('This is Aurora, CO.').addTo(cities),
L.marker([39.77, -105.23]).bindPopup('This is Golden, CO.').addTo(cities);


var mbAttr = 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, ' +
		'<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
		'Imagery © <a href="http://mapbox.com">Mapbox</a>',
	mbUrl = 'https://{s}.tiles.mapbox.com/v3/{id}/{z}/{x}/{y}.png';

var grayscale   = L.tileLayer(mbUrl, {id: 'examples.map-20v6611k', attribution: mbAttr}),
    streets  = L.tileLayer(mbUrl, {id: 'examples.map-i875mjb7',   attribution: mbAttr});

var map = L.map('map', {
	center: [39.73, -104.99],
	zoom: 10,
	layers: [grayscale, cities]
});

var baseLayers = {
	"Grayscale": grayscale,
	"Streets": streets
};

var overlays = {
	"Cities": cities
};

L.control.layers(baseLayers, overlays).addTo(map);

//new code
map.on({
	overlayadd: function(e) {
		if (e.name === 'Cities') alert('added');
	},
	overlayremove: function(e) {
		if (e.name === 'Cities') alert('removed');
	}
});